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<FONT color="green">001</FONT>    package org.codemonkey.javareflection;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.lang.reflect.InvocationTargetException;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.math.BigDecimal;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.math.BigInteger;<a name="line.5"></a>
<FONT color="green">006</FONT>    import java.util.Arrays;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.util.Collections;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.util.List;<a name="line.8"></a>
<FONT color="green">009</FONT>    <a name="line.9"></a>
<FONT color="green">010</FONT>    import org.apache.commons.lang.Validate;<a name="line.10"></a>
<FONT color="green">011</FONT>    import org.apache.commons.lang.math.NumberUtils;<a name="line.11"></a>
<FONT color="green">012</FONT>    <a name="line.12"></a>
<FONT color="green">013</FONT>    /**<a name="line.13"></a>
<FONT color="green">014</FONT>     * This reflection utility class predicts (and converts) which types a specified value can be converted into. It can only do conversions of<a name="line.14"></a>
<FONT color="green">015</FONT>     * known 'common' types, which include:<a name="line.15"></a>
<FONT color="green">016</FONT>     * &lt;ul&gt;<a name="line.16"></a>
<FONT color="green">017</FONT>     * &lt;li&gt;Any {@link Number} type (Integer, Character, Double, byte, etc.)&lt;/li&gt;<a name="line.17"></a>
<FONT color="green">018</FONT>     * &lt;li&gt;&lt;code&gt;String&lt;/code&gt;&lt;/li&gt;<a name="line.18"></a>
<FONT color="green">019</FONT>     * &lt;li&gt;&lt;code&gt;Boolean&lt;/code&gt;&lt;/li&gt;<a name="line.19"></a>
<FONT color="green">020</FONT>     * &lt;li&gt;&lt;code&gt;Character&lt;/code&gt;&lt;/li&gt;<a name="line.20"></a>
<FONT color="green">021</FONT>     * &lt;/ul&gt;<a name="line.21"></a>
<FONT color="green">022</FONT>     * <a name="line.22"></a>
<FONT color="green">023</FONT>     * @author Benny Bottema<a name="line.23"></a>
<FONT color="green">024</FONT>     * @see IncompatibleTypeException<a name="line.24"></a>
<FONT color="green">025</FONT>     */<a name="line.25"></a>
<FONT color="green">026</FONT>    public final class ValueConverter {<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>            /**<a name="line.28"></a>
<FONT color="green">029</FONT>             * List of common types that all other common types can always convert to. For example, &lt;code&gt;String&lt;/code&gt; and &lt;code&gt;Integer&lt;/code&gt; are<a name="line.29"></a>
<FONT color="green">030</FONT>             * basic common types and can be converted to any other common type.<a name="line.30"></a>
<FONT color="green">031</FONT>             */<a name="line.31"></a>
<FONT color="green">032</FONT>            static final List&lt;Class&lt;?&gt;&gt; COMMON_TYPES = Arrays.asList(new Class&lt;?&gt;[] { String.class, Integer.class, int.class, Float.class,<a name="line.32"></a>
<FONT color="green">033</FONT>                            float.class, Double.class, double.class, Long.class, long.class, Byte.class, byte.class, Short.class, short.class,<a name="line.33"></a>
<FONT color="green">034</FONT>                            Boolean.class, boolean.class, Character.class, char.class });<a name="line.34"></a>
<FONT color="green">035</FONT>    <a name="line.35"></a>
<FONT color="green">036</FONT>            /**<a name="line.36"></a>
<FONT color="green">037</FONT>             * A list of all primitive number types.<a name="line.37"></a>
<FONT color="green">038</FONT>             */<a name="line.38"></a>
<FONT color="green">039</FONT>            static final List&lt;Class&lt;?&gt;&gt; PRIMITIVE_NUMBER_TYPES = Arrays.asList(new Class&lt;?&gt;[] { byte.class, short.class, int.class, long.class,<a name="line.39"></a>
<FONT color="green">040</FONT>                            float.class, double.class });<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>            /**<a name="line.42"></a>
<FONT color="green">043</FONT>             * @param c The class to inspect.<a name="line.43"></a>
<FONT color="green">044</FONT>             * @return whether given type is a known common type.<a name="line.44"></a>
<FONT color="green">045</FONT>             */<a name="line.45"></a>
<FONT color="green">046</FONT>            public static boolean isCommonType(final Class&lt;?&gt; c) {<a name="line.46"></a>
<FONT color="green">047</FONT>                    return COMMON_TYPES.contains(c);<a name="line.47"></a>
<FONT color="green">048</FONT>            }<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>            /**<a name="line.50"></a>
<FONT color="green">051</FONT>             * Private constructor prevents from instantiating this utility class.<a name="line.51"></a>
<FONT color="green">052</FONT>             */<a name="line.52"></a>
<FONT color="green">053</FONT>            private ValueConverter() {<a name="line.53"></a>
<FONT color="green">054</FONT>                    // utility class<a name="line.54"></a>
<FONT color="green">055</FONT>            }<a name="line.55"></a>
<FONT color="green">056</FONT>    <a name="line.56"></a>
<FONT color="green">057</FONT>            /**<a name="line.57"></a>
<FONT color="green">058</FONT>             * Determines to which types the specified value (its type) can be converted to. Most common types can be converted to most other common<a name="line.58"></a>
<FONT color="green">059</FONT>             * types and all types can be converted into a String using {@link Object#toString()}.<a name="line.59"></a>
<FONT color="green">060</FONT>             * <a name="line.60"></a>
<FONT color="green">061</FONT>             * @param c The input type to find compatible conversion output types for<a name="line.61"></a>
<FONT color="green">062</FONT>             * @return The list with compatible conversion output types.<a name="line.62"></a>
<FONT color="green">063</FONT>             */<a name="line.63"></a>
<FONT color="green">064</FONT>            public static List&lt;Class&lt;?&gt;&gt; collectCompatibleTypes(final Class&lt;?&gt; c) {<a name="line.64"></a>
<FONT color="green">065</FONT>                    if (isCommonType(c)) {<a name="line.65"></a>
<FONT color="green">066</FONT>                            return Collections.unmodifiableList(COMMON_TYPES);<a name="line.66"></a>
<FONT color="green">067</FONT>                    } else {<a name="line.67"></a>
<FONT color="green">068</FONT>                            // not a common type, we only know we're able to convert to String<a name="line.68"></a>
<FONT color="green">069</FONT>                            return Arrays.asList(new Class&lt;?&gt;[] { String.class });<a name="line.69"></a>
<FONT color="green">070</FONT>                    }<a name="line.70"></a>
<FONT color="green">071</FONT>            }<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>            /**<a name="line.73"></a>
<FONT color="green">074</FONT>             * Converts a list of values to their converted form, as indicated by the specified targetTypes.<a name="line.74"></a>
<FONT color="green">075</FONT>             * <a name="line.75"></a>
<FONT color="green">076</FONT>             * @param args The list with value to convert.<a name="line.76"></a>
<FONT color="green">077</FONT>             * @param targetTypes The output types the specified values should be converted into.<a name="line.77"></a>
<FONT color="green">078</FONT>             * @param useOriginalValueWhenIncompatible Indicates whether an exception should be thrown for inconvertible values or that the original<a name="line.78"></a>
<FONT color="green">079</FONT>             *            value should be used instead.<a name="line.79"></a>
<FONT color="green">080</FONT>             * @return Array containing converted values where convertible or the original value otherwise.<a name="line.80"></a>
<FONT color="green">081</FONT>             * @throws IncompatibleTypeException Thrown when unable to convert and not use the original value.<a name="line.81"></a>
<FONT color="green">082</FONT>             */<a name="line.82"></a>
<FONT color="green">083</FONT>            public static Object[] convert(final Object[] args, final Class&lt;?&gt;[] targetTypes, boolean useOriginalValueWhenIncompatible)<a name="line.83"></a>
<FONT color="green">084</FONT>                            throws IncompatibleTypeException {<a name="line.84"></a>
<FONT color="green">085</FONT>                    if (args.length != targetTypes.length) {<a name="line.85"></a>
<FONT color="green">086</FONT>                            throw new IllegalStateException("number of target types should match the number of arguments");<a name="line.86"></a>
<FONT color="green">087</FONT>                    }<a name="line.87"></a>
<FONT color="green">088</FONT>                    final Object[] convertedValues = new Object[args.length];<a name="line.88"></a>
<FONT color="green">089</FONT>                    for (int i = 0; i &lt; targetTypes.length; i++) {<a name="line.89"></a>
<FONT color="green">090</FONT>                            try {<a name="line.90"></a>
<FONT color="green">091</FONT>                                    convertedValues[i] = convert(args[i], targetTypes[i]);<a name="line.91"></a>
<FONT color="green">092</FONT>                            } catch (IncompatibleTypeException e) {<a name="line.92"></a>
<FONT color="green">093</FONT>                                    if (useOriginalValueWhenIncompatible) {<a name="line.93"></a>
<FONT color="green">094</FONT>                                            // simply take over the original value and keep converting where possible<a name="line.94"></a>
<FONT color="green">095</FONT>                                            convertedValues[i] = args[i];<a name="line.95"></a>
<FONT color="green">096</FONT>                                    } else {<a name="line.96"></a>
<FONT color="green">097</FONT>                                            throw e;<a name="line.97"></a>
<FONT color="green">098</FONT>                                    }<a name="line.98"></a>
<FONT color="green">099</FONT>                            }<a name="line.99"></a>
<FONT color="green">100</FONT>                    }<a name="line.100"></a>
<FONT color="green">101</FONT>                    return convertedValues;<a name="line.101"></a>
<FONT color="green">102</FONT>            }<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>            /**<a name="line.104"></a>
<FONT color="green">105</FONT>             * Converts a single value into a target output datatype. Only input/output pairs should be passed in here according to the possible<a name="line.105"></a>
<FONT color="green">106</FONT>             * conversions as determined by {@link #collectCompatibleTypes(Class)}.&lt;br /&gt;<a name="line.106"></a>
<FONT color="green">107</FONT>             * &lt;br /&gt;<a name="line.107"></a>
<FONT color="green">108</FONT>             * First checks if the input and output types aren't the same. Then the conversions are checked for and done in the following order:<a name="line.108"></a>
<FONT color="green">109</FONT>             * &lt;ol&gt;<a name="line.109"></a>
<FONT color="green">110</FONT>             * &lt;li&gt;conversion to &lt;code&gt;String&lt;/code&gt;&lt;/li&gt;<a name="line.110"></a>
<FONT color="green">111</FONT>             * &lt;li&gt;conversion to any {@link Number}&lt;/li&gt;<a name="line.111"></a>
<FONT color="green">112</FONT>             * &lt;li&gt;conversion to &lt;code&gt;Boolean&lt;/code&gt;&lt;/li&gt;<a name="line.112"></a>
<FONT color="green">113</FONT>             * &lt;li&gt;conversion to &lt;code&gt;Character&lt;/code&gt;&lt;/li&gt;<a name="line.113"></a>
<FONT color="green">114</FONT>             * &lt;/ol&gt;<a name="line.114"></a>
<FONT color="green">115</FONT>             * <a name="line.115"></a>
<FONT color="green">116</FONT>             * @param value The value to convert.<a name="line.116"></a>
<FONT color="green">117</FONT>             * @param targetType The target datatype the value should be converted into.<a name="line.117"></a>
<FONT color="green">118</FONT>             * @return The converted value according the specified target datatype.<a name="line.118"></a>
<FONT color="green">119</FONT>             * @throws IncompatibleTypeException<a name="line.119"></a>
<FONT color="green">120</FONT>             */<a name="line.120"></a>
<FONT color="green">121</FONT>            public static Object convert(final Object value, final Class&lt;?&gt; targetType)<a name="line.121"></a>
<FONT color="green">122</FONT>                            throws IncompatibleTypeException {<a name="line.122"></a>
<FONT color="green">123</FONT>                    if (value == null) {<a name="line.123"></a>
<FONT color="green">124</FONT>                            return null;<a name="line.124"></a>
<FONT color="green">125</FONT>                    }<a name="line.125"></a>
<FONT color="green">126</FONT>                    final Class&lt;?&gt; valueType = value.getClass();<a name="line.126"></a>
<FONT color="green">127</FONT>    <a name="line.127"></a>
<FONT color="green">128</FONT>                    // 1. check if conversion is required to begin with<a name="line.128"></a>
<FONT color="green">129</FONT>                    if (targetType.isAssignableFrom(valueType)) {<a name="line.129"></a>
<FONT color="green">130</FONT>                            return value;<a name="line.130"></a>
<FONT color="green">131</FONT>                            // 2. check if we can simply use Object.toString() implementation<a name="line.131"></a>
<FONT color="green">132</FONT>                    } else if (targetType.equals(String.class)) {<a name="line.132"></a>
<FONT color="green">133</FONT>                            return value.toString();<a name="line.133"></a>
<FONT color="green">134</FONT>                            // 3. check if we can reuse conversion from String<a name="line.134"></a>
<FONT color="green">135</FONT>                    } else if (valueType.equals(String.class)) {<a name="line.135"></a>
<FONT color="green">136</FONT>                            return convert((String) value, targetType);<a name="line.136"></a>
<FONT color="green">137</FONT>                            // 4. check if we can reuse conversion from a Number subtype<a name="line.137"></a>
<FONT color="green">138</FONT>                    } else if (Number.class.isAssignableFrom(valueType) || isPrimitiveNumber(valueType)) {<a name="line.138"></a>
<FONT color="green">139</FONT>                            return convert((Number) value, targetType);<a name="line.139"></a>
<FONT color="green">140</FONT>                            // 4. check if we can reuse conversion from boolean value<a name="line.140"></a>
<FONT color="green">141</FONT>                    } else if (valueType.equals(Boolean.class) || valueType.equals(boolean.class)) {<a name="line.141"></a>
<FONT color="green">142</FONT>                            return convert((Boolean) value, targetType);<a name="line.142"></a>
<FONT color="green">143</FONT>                            // 5. check if we can reuse conversion from character<a name="line.143"></a>
<FONT color="green">144</FONT>                    } else if (valueType.equals(Character.class) || valueType.equals(char.class)) {<a name="line.144"></a>
<FONT color="green">145</FONT>                            return convert((Character) value, targetType);<a name="line.145"></a>
<FONT color="green">146</FONT>                    } else {<a name="line.146"></a>
<FONT color="green">147</FONT>                            throw new IncompatibleTypeException(value, valueType.toString(), targetType.toString());<a name="line.147"></a>
<FONT color="green">148</FONT>                    }<a name="line.148"></a>
<FONT color="green">149</FONT>            }<a name="line.149"></a>
<FONT color="green">150</FONT>    <a name="line.150"></a>
<FONT color="green">151</FONT>            /**<a name="line.151"></a>
<FONT color="green">152</FONT>             * Attempts to convert a {@link Number} to the target datatype.<a name="line.152"></a>
<FONT color="green">153</FONT>             * &lt;p&gt;<a name="line.153"></a>
<FONT color="green">154</FONT>             * &lt;strong&gt;NOTE: &lt;/strong&gt; precision may be lost when converting from a wide number to a narrower number (say float to integer). These<a name="line.154"></a>
<FONT color="green">155</FONT>             * conversions are done by simply calling {@link Number#intValue()} and {@link Number#floatValue()} etc.<a name="line.155"></a>
<FONT color="green">156</FONT>             * <a name="line.156"></a>
<FONT color="green">157</FONT>             * @param value The number to convert.<a name="line.157"></a>
<FONT color="green">158</FONT>             * @param targetType The target datatype the number should be converted into.<a name="line.158"></a>
<FONT color="green">159</FONT>             * @return The converted number.<a name="line.159"></a>
<FONT color="green">160</FONT>             * @throws IncompatibleTypeException<a name="line.160"></a>
<FONT color="green">161</FONT>             */<a name="line.161"></a>
<FONT color="green">162</FONT>            public static Object convert(final Number value, final Class&lt;?&gt; targetType)<a name="line.162"></a>
<FONT color="green">163</FONT>                            throws IncompatibleTypeException {<a name="line.163"></a>
<FONT color="green">164</FONT>                    if (value == null) {<a name="line.164"></a>
<FONT color="green">165</FONT>                            return null;<a name="line.165"></a>
<FONT color="green">166</FONT>                    }<a name="line.166"></a>
<FONT color="green">167</FONT>                    if (targetType.equals(String.class)) {<a name="line.167"></a>
<FONT color="green">168</FONT>                            return value.toString();<a name="line.168"></a>
<FONT color="green">169</FONT>                    } else if (targetType.equals(Integer.class) || targetType.equals(int.class)) {<a name="line.169"></a>
<FONT color="green">170</FONT>                            return value.intValue();<a name="line.170"></a>
<FONT color="green">171</FONT>                    } else if (targetType.equals(Boolean.class) || targetType.equals(boolean.class)) {<a name="line.171"></a>
<FONT color="green">172</FONT>                            // any non-zero number converts to true<a name="line.172"></a>
<FONT color="green">173</FONT>                            return value.intValue() &gt; 0;<a name="line.173"></a>
<FONT color="green">174</FONT>                    } else if (targetType.equals(Float.class) || targetType.equals(float.class)) {<a name="line.174"></a>
<FONT color="green">175</FONT>                            return value.floatValue();<a name="line.175"></a>
<FONT color="green">176</FONT>                    } else if (targetType.equals(Double.class) || targetType.equals(double.class)) {<a name="line.176"></a>
<FONT color="green">177</FONT>                            return value.doubleValue();<a name="line.177"></a>
<FONT color="green">178</FONT>                    } else if (targetType.equals(Long.class) || targetType.equals(long.class)) {<a name="line.178"></a>
<FONT color="green">179</FONT>                            return value.longValue();<a name="line.179"></a>
<FONT color="green">180</FONT>                    } else if (targetType.equals(Byte.class) || targetType.equals(byte.class)) {<a name="line.180"></a>
<FONT color="green">181</FONT>                            return value.byteValue();<a name="line.181"></a>
<FONT color="green">182</FONT>                    } else if (targetType.equals(Short.class) || targetType.equals(short.class)) {<a name="line.182"></a>
<FONT color="green">183</FONT>                            return value.shortValue();<a name="line.183"></a>
<FONT color="green">184</FONT>                    } else if (targetType.equals(Character.class) || targetType.equals(char.class)) {<a name="line.184"></a>
<FONT color="green">185</FONT>                            return Character.forDigit(value.intValue(), 10);<a name="line.185"></a>
<FONT color="green">186</FONT>                    } else {<a name="line.186"></a>
<FONT color="green">187</FONT>                            throw new IncompatibleTypeException(value, value.getClass().toString(), targetType.toString());<a name="line.187"></a>
<FONT color="green">188</FONT>                    }<a name="line.188"></a>
<FONT color="green">189</FONT>            }<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>            /**<a name="line.191"></a>
<FONT color="green">192</FONT>             * Attempts to convert a &lt;code&gt;Boolean&lt;/code&gt; to the target datatype.<a name="line.192"></a>
<FONT color="green">193</FONT>             * <a name="line.193"></a>
<FONT color="green">194</FONT>             * @param value The boolean to convert.<a name="line.194"></a>
<FONT color="green">195</FONT>             * @param targetType The target datatype the boolean should be converted into.<a name="line.195"></a>
<FONT color="green">196</FONT>             * @return The converted boolean.<a name="line.196"></a>
<FONT color="green">197</FONT>             * @throws IncompatibleTypeException<a name="line.197"></a>
<FONT color="green">198</FONT>             */<a name="line.198"></a>
<FONT color="green">199</FONT>            @SuppressWarnings("unchecked")<a name="line.199"></a>
<FONT color="green">200</FONT>            public static Object convert(final Boolean value, final Class&lt;?&gt; targetType)<a name="line.200"></a>
<FONT color="green">201</FONT>                            throws IncompatibleTypeException {<a name="line.201"></a>
<FONT color="green">202</FONT>                    if (value == null) {<a name="line.202"></a>
<FONT color="green">203</FONT>                            return null;<a name="line.203"></a>
<FONT color="green">204</FONT>                    }<a name="line.204"></a>
<FONT color="green">205</FONT>                    if (targetType.equals(Boolean.class) || targetType.equals(boolean.class)) {<a name="line.205"></a>
<FONT color="green">206</FONT>                            return value;<a name="line.206"></a>
<FONT color="green">207</FONT>                    } else if (targetType.equals(String.class)) {<a name="line.207"></a>
<FONT color="green">208</FONT>                            return value.toString();<a name="line.208"></a>
<FONT color="green">209</FONT>                    } else if (Number.class.isAssignableFrom(targetType) || isPrimitiveNumber(targetType)) {<a name="line.209"></a>
<FONT color="green">210</FONT>                            return convertNumber(value ? "1" : "0", (Class&lt;Number&gt;) targetType);<a name="line.210"></a>
<FONT color="green">211</FONT>                    } else if (targetType.equals(Character.class) || targetType.equals(char.class)) {<a name="line.211"></a>
<FONT color="green">212</FONT>                            return value ? '1' : '0';<a name="line.212"></a>
<FONT color="green">213</FONT>                    }<a name="line.213"></a>
<FONT color="green">214</FONT>                    // Boolean value incompatible with targetType<a name="line.214"></a>
<FONT color="green">215</FONT>                    throw new IncompatibleTypeException(value, Boolean.class.toString(), targetType.toString());<a name="line.215"></a>
<FONT color="green">216</FONT>            }<a name="line.216"></a>
<FONT color="green">217</FONT>    <a name="line.217"></a>
<FONT color="green">218</FONT>            /**<a name="line.218"></a>
<FONT color="green">219</FONT>             * Attempts to convert a &lt;code&gt;Character&lt;/code&gt; to the target datatype.<a name="line.219"></a>
<FONT color="green">220</FONT>             * <a name="line.220"></a>
<FONT color="green">221</FONT>             * @param value The character to convert.<a name="line.221"></a>
<FONT color="green">222</FONT>             * @param targetType The target datatype the character should be converted into.<a name="line.222"></a>
<FONT color="green">223</FONT>             * @return The converted character.<a name="line.223"></a>
<FONT color="green">224</FONT>             * @throws IncompatibleTypeException<a name="line.224"></a>
<FONT color="green">225</FONT>             */<a name="line.225"></a>
<FONT color="green">226</FONT>            @SuppressWarnings("unchecked")<a name="line.226"></a>
<FONT color="green">227</FONT>            public static Object convert(final Character value, final Class&lt;?&gt; targetType)<a name="line.227"></a>
<FONT color="green">228</FONT>                            throws IncompatibleTypeException {<a name="line.228"></a>
<FONT color="green">229</FONT>                    if (value == null) {<a name="line.229"></a>
<FONT color="green">230</FONT>                            return null;<a name="line.230"></a>
<FONT color="green">231</FONT>                    }<a name="line.231"></a>
<FONT color="green">232</FONT>                    if (targetType.equals(String.class)) {<a name="line.232"></a>
<FONT color="green">233</FONT>                            return value.toString();<a name="line.233"></a>
<FONT color="green">234</FONT>                    } else if (targetType.equals(char.class) || targetType.equals(Character.class)) {<a name="line.234"></a>
<FONT color="green">235</FONT>                            return value;<a name="line.235"></a>
<FONT color="green">236</FONT>                    } else if (Number.class.isAssignableFrom(targetType) || isPrimitiveNumber(targetType)) {<a name="line.236"></a>
<FONT color="green">237</FONT>                            // convert Character to Number<a name="line.237"></a>
<FONT color="green">238</FONT>                            return convertNumber(String.valueOf(value), (Class&lt;Number&gt;) targetType);<a name="line.238"></a>
<FONT color="green">239</FONT>                    } else if (targetType.equals(Boolean.class) || targetType.equals(boolean.class)) {<a name="line.239"></a>
<FONT color="green">240</FONT>                            // convert Character to Boolean<a name="line.240"></a>
<FONT color="green">241</FONT>                            if (value.equals('0')) {<a name="line.241"></a>
<FONT color="green">242</FONT>                                    return false;<a name="line.242"></a>
<FONT color="green">243</FONT>                            } else if (value.equals('1')) {<a name="line.243"></a>
<FONT color="green">244</FONT>                                    return true;<a name="line.244"></a>
<FONT color="green">245</FONT>                            } else {<a name="line.245"></a>
<FONT color="green">246</FONT>                                    // Character incompatible with type Boolean<a name="line.246"></a>
<FONT color="green">247</FONT>                            }<a name="line.247"></a>
<FONT color="green">248</FONT>                    }<a name="line.248"></a>
<FONT color="green">249</FONT>                    // Character incompatible with type targetType<a name="line.249"></a>
<FONT color="green">250</FONT>                    throw new IncompatibleTypeException(value, Character.class.toString(), targetType.toString());<a name="line.250"></a>
<FONT color="green">251</FONT>            }<a name="line.251"></a>
<FONT color="green">252</FONT>    <a name="line.252"></a>
<FONT color="green">253</FONT>            /**<a name="line.253"></a>
<FONT color="green">254</FONT>             * Attempts to convert a &lt;code&gt;String&lt;/code&gt; to the target datatype.<a name="line.254"></a>
<FONT color="green">255</FONT>             * <a name="line.255"></a>
<FONT color="green">256</FONT>             * @param value The string to convert.<a name="line.256"></a>
<FONT color="green">257</FONT>             * @param targetType The target datatype the string should be converted into.<a name="line.257"></a>
<FONT color="green">258</FONT>             * @return The converted string.<a name="line.258"></a>
<FONT color="green">259</FONT>             * @throws IncompatibleTypeException<a name="line.259"></a>
<FONT color="green">260</FONT>             */<a name="line.260"></a>
<FONT color="green">261</FONT>            @SuppressWarnings("unchecked")<a name="line.261"></a>
<FONT color="green">262</FONT>            public static Object convert(final String value, final Class&lt;?&gt; targetType)<a name="line.262"></a>
<FONT color="green">263</FONT>                            throws IncompatibleTypeException {<a name="line.263"></a>
<FONT color="green">264</FONT>                    if (value == null) {<a name="line.264"></a>
<FONT color="green">265</FONT>                            return null;<a name="line.265"></a>
<FONT color="green">266</FONT>                    } else if (targetType.equals(String.class)) {<a name="line.266"></a>
<FONT color="green">267</FONT>                            return value;<a name="line.267"></a>
<FONT color="green">268</FONT>                    } else if (targetType.isEnum()) {<a name="line.268"></a>
<FONT color="green">269</FONT>                            return convertEnum(value, (Class&lt;? extends Enum&lt;?&gt;&gt;) targetType);<a name="line.269"></a>
<FONT color="green">270</FONT>                    } else if (value.length() &gt; 0) {<a name="line.270"></a>
<FONT color="green">271</FONT>                            if (value.length() == 1) {<a name="line.271"></a>
<FONT color="green">272</FONT>                                    // Convert String as Character<a name="line.272"></a>
<FONT color="green">273</FONT>                                    if (targetType.equals(Character.class) || targetType.equals(char.class)) {<a name="line.273"></a>
<FONT color="green">274</FONT>                                            return value.charAt(0);<a name="line.274"></a>
<FONT color="green">275</FONT>                                    } else {<a name="line.275"></a>
<FONT color="green">276</FONT>                                            return convert(value.charAt(0), targetType);<a name="line.276"></a>
<FONT color="green">277</FONT>                                    }<a name="line.277"></a>
<FONT color="green">278</FONT>                            } else if (Number.class.isAssignableFrom(targetType) || isPrimitiveNumber(targetType)) {<a name="line.278"></a>
<FONT color="green">279</FONT>                                    return convertNumber(value, (Class&lt;? extends Number&gt;) targetType);<a name="line.279"></a>
<FONT color="green">280</FONT>                            } else if (targetType.equals(Boolean.class) || targetType.equals(boolean.class)) {<a name="line.280"></a>
<FONT color="green">281</FONT>                                    // convert String to Boolean<a name="line.281"></a>
<FONT color="green">282</FONT>                                    if (value.equalsIgnoreCase("false") || value.equalsIgnoreCase("0")) {<a name="line.282"></a>
<FONT color="green">283</FONT>                                            return false;<a name="line.283"></a>
<FONT color="green">284</FONT>                                    } else if (value.equalsIgnoreCase("true") || value.equalsIgnoreCase("1")) {<a name="line.284"></a>
<FONT color="green">285</FONT>                                            return true;<a name="line.285"></a>
<FONT color="green">286</FONT>                                    } else {<a name="line.286"></a>
<FONT color="green">287</FONT>                                            // String incompatible with type Boolean<a name="line.287"></a>
<FONT color="green">288</FONT>                                    }<a name="line.288"></a>
<FONT color="green">289</FONT>                            }<a name="line.289"></a>
<FONT color="green">290</FONT>                    }<a name="line.290"></a>
<FONT color="green">291</FONT>                    // String value incompatible with targetType<a name="line.291"></a>
<FONT color="green">292</FONT>                    throw new IncompatibleTypeException(value, value.getClass().toString(), targetType.toString());<a name="line.292"></a>
<FONT color="green">293</FONT>            }<a name="line.293"></a>
<FONT color="green">294</FONT>    <a name="line.294"></a>
<FONT color="green">295</FONT>            /**<a name="line.295"></a>
<FONT color="green">296</FONT>             * Attempts to convert a &lt;code&gt;String&lt;/code&gt; to an Enum instance, by mapping to the enum's name using<a name="line.296"></a>
<FONT color="green">297</FONT>             * {@link Enum#valueOf(Class, String)}.<a name="line.297"></a>
<FONT color="green">298</FONT>             * <a name="line.298"></a>
<FONT color="green">299</FONT>             * @param value The value, which should be the name of one instance of the given enum.<a name="line.299"></a>
<FONT color="green">300</FONT>             * @param targetType The enum type to which which we'll try to convert.<a name="line.300"></a>
<FONT color="green">301</FONT>             * @return An enum of the given type, or &lt;code&gt;null&lt;/code&gt; otherwise.<a name="line.301"></a>
<FONT color="green">302</FONT>             */<a name="line.302"></a>
<FONT color="green">303</FONT>            public static Object convertEnum(final String value, final Class&lt;? extends Enum&lt;?&gt;&gt; targetType) {<a name="line.303"></a>
<FONT color="green">304</FONT>                    if (value == null) {<a name="line.304"></a>
<FONT color="green">305</FONT>                            return null;<a name="line.305"></a>
<FONT color="green">306</FONT>                    }<a name="line.306"></a>
<FONT color="green">307</FONT>                    // /CLOVER:OFF<a name="line.307"></a>
<FONT color="green">308</FONT>                    try {<a name="line.308"></a>
<FONT color="green">309</FONT>                            // /CLOVER:ON<a name="line.309"></a>
<FONT color="green">310</FONT>                            return targetType.getMethod("valueOf", String.class).invoke(null, value);<a name="line.310"></a>
<FONT color="green">311</FONT>                            // /CLOVER:OFF<a name="line.311"></a>
<FONT color="green">312</FONT>                    } catch (final IllegalArgumentException e) {<a name="line.312"></a>
<FONT color="green">313</FONT>                            throw new IncompatibleTypeException(value, Enum.class.toString(), targetType.toString(), e);<a name="line.313"></a>
<FONT color="green">314</FONT>                    } catch (final SecurityException e) {<a name="line.314"></a>
<FONT color="green">315</FONT>                            throw new IncompatibleTypeException(value, Enum.class.toString(), targetType.toString(), e);<a name="line.315"></a>
<FONT color="green">316</FONT>                    } catch (final IllegalAccessException e) {<a name="line.316"></a>
<FONT color="green">317</FONT>                            throw new IncompatibleTypeException(value, Enum.class.toString(), targetType.toString(), e);<a name="line.317"></a>
<FONT color="green">318</FONT>                    } catch (final InvocationTargetException e) {<a name="line.318"></a>
<FONT color="green">319</FONT>                            throw new IncompatibleTypeException(value, Enum.class.toString(), targetType.toString(), e);<a name="line.319"></a>
<FONT color="green">320</FONT>                    } catch (final NoSuchMethodException e) {<a name="line.320"></a>
<FONT color="green">321</FONT>                            throw new IncompatibleTypeException(value, Enum.class.toString(), targetType.toString(), e);<a name="line.321"></a>
<FONT color="green">322</FONT>                    }<a name="line.322"></a>
<FONT color="green">323</FONT>                    // /CLOVER:ON<a name="line.323"></a>
<FONT color="green">324</FONT>    <a name="line.324"></a>
<FONT color="green">325</FONT>            }<a name="line.325"></a>
<FONT color="green">326</FONT>    <a name="line.326"></a>
<FONT color="green">327</FONT>            /**<a name="line.327"></a>
<FONT color="green">328</FONT>             * Attempts to convert a &lt;code&gt;String&lt;/code&gt; to the specified &lt;code&gt;Number&lt;/code&gt; type.<a name="line.328"></a>
<FONT color="green">329</FONT>             * <a name="line.329"></a>
<FONT color="green">330</FONT>             * @param value The string value which should be a number.<a name="line.330"></a>
<FONT color="green">331</FONT>             * @param numberType The &lt;code&gt;Class&lt;/code&gt; type that should be one of &lt;code&gt;Number&lt;/code&gt;.<a name="line.331"></a>
<FONT color="green">332</FONT>             * @return A {@link Number} subtype value converted from &lt;code&gt;value&lt;/code&gt; (or &lt;code&gt;null&lt;/code&gt; if value is &lt;code&gt;null&lt;/code&gt;).<a name="line.332"></a>
<FONT color="green">333</FONT>             */<a name="line.333"></a>
<FONT color="green">334</FONT>            public static Object convertNumber(final String value, final Class&lt;? extends Number&gt; numberType) {<a name="line.334"></a>
<FONT color="green">335</FONT>                    if (value == null) {<a name="line.335"></a>
<FONT color="green">336</FONT>                            return null;<a name="line.336"></a>
<FONT color="green">337</FONT>                    }<a name="line.337"></a>
<FONT color="green">338</FONT>                    Validate.isTrue(Number.class.isAssignableFrom(numberType) || isPrimitiveNumber(numberType));<a name="line.338"></a>
<FONT color="green">339</FONT>                    if (NumberUtils.isNumber(value)) {<a name="line.339"></a>
<FONT color="green">340</FONT>                            if (Integer.class.equals(numberType) || int.class.equals(numberType) || Number.class.equals(numberType)) {<a name="line.340"></a>
<FONT color="green">341</FONT>                                    return Integer.parseInt(value);<a name="line.341"></a>
<FONT color="green">342</FONT>                            } else if (Byte.class.equals(numberType) || byte.class.equals(numberType)) {<a name="line.342"></a>
<FONT color="green">343</FONT>                                    return Byte.parseByte(value);<a name="line.343"></a>
<FONT color="green">344</FONT>                            } else if (Short.class.equals(numberType) || short.class.equals(numberType)) {<a name="line.344"></a>
<FONT color="green">345</FONT>                                    return Short.parseShort(value);<a name="line.345"></a>
<FONT color="green">346</FONT>                            } else if (Long.class.equals(numberType) || long.class.equals(numberType)) {<a name="line.346"></a>
<FONT color="green">347</FONT>                                    return Long.parseLong(value);<a name="line.347"></a>
<FONT color="green">348</FONT>                            } else if (Float.class.equals(numberType) || float.class.equals(numberType)) {<a name="line.348"></a>
<FONT color="green">349</FONT>                                    return Float.parseFloat(value);<a name="line.349"></a>
<FONT color="green">350</FONT>                            } else if (Double.class.equals(numberType) || double.class.equals(numberType)) {<a name="line.350"></a>
<FONT color="green">351</FONT>                                    return Double.parseDouble(value);<a name="line.351"></a>
<FONT color="green">352</FONT>                            } else if (BigInteger.class.equals(numberType)) {<a name="line.352"></a>
<FONT color="green">353</FONT>                                    return BigInteger.valueOf(Long.parseLong(value));<a name="line.353"></a>
<FONT color="green">354</FONT>                            } else if (BigDecimal.class.equals(numberType)) {<a name="line.354"></a>
<FONT color="green">355</FONT>                                    return BigDecimal.valueOf(Long.parseLong(value));<a name="line.355"></a>
<FONT color="green">356</FONT>                            } else {<a name="line.356"></a>
<FONT color="green">357</FONT>                                    // specified type incompatible with Number<a name="line.357"></a>
<FONT color="green">358</FONT>                                    throw new IncompatibleTypeException(value, value.getClass().toString(), numberType.toString());<a name="line.358"></a>
<FONT color="green">359</FONT>                            }<a name="line.359"></a>
<FONT color="green">360</FONT>                    } else {<a name="line.360"></a>
<FONT color="green">361</FONT>                            // specified value incompatible with Number<a name="line.361"></a>
<FONT color="green">362</FONT>                            throw new IncompatibleTypeException(value, value.getClass().toString(), numberType.toString());<a name="line.362"></a>
<FONT color="green">363</FONT>                    }<a name="line.363"></a>
<FONT color="green">364</FONT>            }<a name="line.364"></a>
<FONT color="green">365</FONT>    <a name="line.365"></a>
<FONT color="green">366</FONT>            /**<a name="line.366"></a>
<FONT color="green">367</FONT>             * Returns whether a {@link Class} is a primitive number.<a name="line.367"></a>
<FONT color="green">368</FONT>             * <a name="line.368"></a>
<FONT color="green">369</FONT>             * @param targetType The class to check whether it's a number.<a name="line.369"></a>
<FONT color="green">370</FONT>             * @return Whether specified class is a primitive number.<a name="line.370"></a>
<FONT color="green">371</FONT>             */<a name="line.371"></a>
<FONT color="green">372</FONT>            public final static boolean isPrimitiveNumber(final Class&lt;?&gt; targetType) {<a name="line.372"></a>
<FONT color="green">373</FONT>                    return PRIMITIVE_NUMBER_TYPES.contains(targetType);<a name="line.373"></a>
<FONT color="green">374</FONT>            }<a name="line.374"></a>
<FONT color="green">375</FONT>    <a name="line.375"></a>
<FONT color="green">376</FONT>            /**<a name="line.376"></a>
<FONT color="green">377</FONT>             * This exception can be thrown in any of the conversion methods of {@link ValueConverter}, to indicate a value could not be converted<a name="line.377"></a>
<FONT color="green">378</FONT>             * into the target datatype. It doesn't mean a failed attempt at a conversion, it means that there was no way to convert the input value<a name="line.378"></a>
<FONT color="green">379</FONT>             * to begin with.<a name="line.379"></a>
<FONT color="green">380</FONT>             * <a name="line.380"></a>
<FONT color="green">381</FONT>             * @author Benny Bottema<a name="line.381"></a>
<FONT color="green">382</FONT>             */<a name="line.382"></a>
<FONT color="green">383</FONT>            public static final class IncompatibleTypeException extends RuntimeException {<a name="line.383"></a>
<FONT color="green">384</FONT>                    private static final long serialVersionUID = -9234872336546L;<a name="line.384"></a>
<FONT color="green">385</FONT>    <a name="line.385"></a>
<FONT color="green">386</FONT>                    private static final String pattern = "error: unable to convert value '%s': '%s' to '%s'";<a name="line.386"></a>
<FONT color="green">387</FONT>    <a name="line.387"></a>
<FONT color="green">388</FONT>                    /**<a name="line.388"></a>
<FONT color="green">389</FONT>                     * @see RuntimeException#RuntimeException(String, Throwable)<a name="line.389"></a>
<FONT color="green">390</FONT>                     */<a name="line.390"></a>
<FONT color="green">391</FONT>                    public IncompatibleTypeException(final String message, final Exception e) {<a name="line.391"></a>
<FONT color="green">392</FONT>                            super(message, e);<a name="line.392"></a>
<FONT color="green">393</FONT>                    }<a name="line.393"></a>
<FONT color="green">394</FONT>    <a name="line.394"></a>
<FONT color="green">395</FONT>                    /**<a name="line.395"></a>
<FONT color="green">396</FONT>                     * @see RuntimeException#RuntimeException(String)<a name="line.396"></a>
<FONT color="green">397</FONT>                     */<a name="line.397"></a>
<FONT color="green">398</FONT>                    public IncompatibleTypeException(final Object value, final String className, final String targetName) {<a name="line.398"></a>
<FONT color="green">399</FONT>                            super(String.format(pattern, value, className, targetName));<a name="line.399"></a>
<FONT color="green">400</FONT>                    }<a name="line.400"></a>
<FONT color="green">401</FONT>    <a name="line.401"></a>
<FONT color="green">402</FONT>                    /**<a name="line.402"></a>
<FONT color="green">403</FONT>                     * @see RuntimeException#RuntimeException(String, Throwable)<a name="line.403"></a>
<FONT color="green">404</FONT>                     */<a name="line.404"></a>
<FONT color="green">405</FONT>                    public IncompatibleTypeException(final Object value, final String className, final String targetName,<a name="line.405"></a>
<FONT color="green">406</FONT>                                    final Exception nestedException) {<a name="line.406"></a>
<FONT color="green">407</FONT>                            super(String.format(pattern, value, className, targetName), nestedException);<a name="line.407"></a>
<FONT color="green">408</FONT>                    }<a name="line.408"></a>
<FONT color="green">409</FONT>            }<a name="line.409"></a>
<FONT color="green">410</FONT>    }<a name="line.410"></a>




























































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